Farringtonite Mineral Data

Farringtonite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About


General Farringtonite Information

Help on Chemical Formula: Chemical Formula: Mg3(PO4)2
Help on Composition: Composition: Molecular Weight = 262.86 gm
   Magnesium   27.74 %  Mg   46.00 % MgO
   Phosphorus  23.57 %  P    54.00 % P2O5
   Oxygen      48.69 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3(PO4)2
Help on Environment: Environment: Component in pallasite meteorites, rimming and cementing olivine nodules.
Help on IMA Status: IMA Status: Approved IMA 1961
Help on Locality: Locality: Springwater, Krasnojarsk, Zaisho, Imilac, and Port Orford pallasite meteorites. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Oliver Cummings Farrington (1864-1933), Curator of Geology, Field Museum of Natural History, Chicago, Illinois, USA.
Help on Name Pronunciation: Name Pronunciation: Farringtonite + Pronunciation Say FARRINGTONITE
Help on Synonym: Synonym: ICSD 31005
  PDF 33-876
 

Farringtonite Image

Click Here for Larger Farringtonite Image in a New Browser Window Images:
Click Here for Larger Farringtonite Image

Farringtonite

Comments: B&W BSE image of a fragment of farringtonite mounted in an epoxy grain mount.
Location: Springwater Pallasite, Saskatchewan, Canada (1931). Scale: See Image.
© Diederik Visser

Farringtonite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9234:1:0.6172
Help on Cell Dimensions: Cell Dimensions: a = 7.6, b = 8.23, c = 5.08, Z = 2; beta = 94.06° V = 316.95 Den(Calc)= 2.75
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.44(1), 3.85(0.9), 4.08(0.5),
Click Here for Large Farringtonite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Nord A G , Kierkegaard P , Acta Chemica Scandinavica , 22 (1968) p.1466-1474, The crystal structure of Mg3(PO4)2, Locality: synthetic

 

Physical Properties of Farringtonite

Help on Cleavage: Cleavage: {100} Good, {010} Good
Help on Color: Color: White, Wax yellow.
Help on Density: Density: 2.74
Help on Streak: Streak: white
 

Optical Properties of Farringtonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1992,KPDmeas= 0.1999,KC= 0.1908
Ncalc = 1.52
Help on Optical Data: Optical Data: Biaxial (+), a=1.54, b=1.544, g=1.559, bire=0.0190, 2V(Calc)=56, 2V(Meas)=54-55.
 

Calculated Properties of Farringtonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.72 gm/cc
note: Specific Gravity of Farringtonite =2.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEFarringtonite = 1.74 barns/electron
U=PEFarringtonite x rElectron Density= 4.73 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Farringtonite is Not Radioactive
 

Farringtonite Classification
Help on Dana Class: Dana Class: 38.03.01.02 (38)Anhydrous Phosphates, etc
  (38.03)(A+ B++)3 (XO4)2
  (38.03.01)Sarcopside Group
 
38.03.01.01 Sarcopside (Fe,Mn,Mg)3(PO4)2 P 21/a 2/m
 
38.03.01.02 Farringtonite Mg3(PO4)2 P 21/a 2/m
 
38.03.01.03 Chopinite! (Mg,Fe)3(PO4)2 P 21/c 2/m
Help on Strunz Class: Strunz Class: 08.AB.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AB -With medium-sized cations
 
08.AB.05 Farringtonite Mg3(PO4)2 P 21/a 2/m
 

Other Farringtonite Information
Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Farringtonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Farringtonite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Farringtonite :

A Bijoux Google Search for Farringtonite
Adam's Minerals Google Search for Farringtonite
Cape Minerals Google Search for Farringtonite
Dakota Matrix Minerals Google Search for Farringtonite
Excalibur Mineral Corp. Google Search for Farringtonite
Exceptional Minerals Google Search for Farringtonite
John Betts Fine Minerals Search for Farringtonite
McDougall Minerals Google Search for Farringtonite
Mineral News Website Link
Rock and Mineral Shows Google Search for Farringtonite
Weinrich Minerals, Inc. Google Search for Farringtonite

Ask about Farringtonite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Farringtonite Specimen Label here :

Farringtonite

Mg3(PO4)2
Dana No: 38.03.01.02 Strunz No: 08.AB.05
Locality:

 

Notes: